Getting My KYW Crystal To Work
Getting My KYW Crystal To Work
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly substantial in contrast with that of Yb:YAG. This enables for vast wavelength tunability and for Substantially shorter pulse durations from method-locked lasers. Values nicely down below one hundred fs are already attained with passive mode locking.
This special attribute of ultrafast pulses enables nonlinear optical conversation with tissue at very low General exposure, and drives purposes like deep-tissue multiphoton microscopy and substantial-precision eye surgery
Femtosecond laser depending on Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the heartbeat
FIG. four. Autocorrelation operate of the pulse 共a兲and spectrum 共b兲of the laser with an oblong Energetic element for an output electricity of 700 mW. The width of
Optical layout of the laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output of your radiation, WP is often a fifty percent-wave plate, CL is a collimating lens, FL is often a focusing lens, AE is really an active element created from an Yb:KYW crystal, DM is a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC could be the output mirror, and SAM is a semiconductor saturable-absorber mirror.
The monoclinic crystal structures results in a purely natural birefringence, helping to steer clear of thermally induced polarization rotation and depolarization decline.
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five mm aside from the middle on the beam caustic. In an effort to Verify the manner matching simulation, we carried out the experiment with Ng-Slash crystal oscillator, which was formulated previously As well as click here in a similar problem with simulation [eleven]. As shown in Determine three(b) with red dots and line, the CW output electric power is highly dependent on the posture of laser crystal as well as the experimental final result coincides nicely with simulation consequence. As a Be aware, multimode operation transpired in experiment in the event the size with the pump beam is bigger than TEM00 cavity mode and it will cause bigger CW output energy inside the displacement area under 3.5 mm.
For tungstates, the ytterbium doping concentration can be quite superior with out sizeable quenching because the replaced ions have an incredibly comparable ion radius, along with the inter-ion length is fairly significant.
... Not simply the situation of crystal from the cavity and also the amplification axis of crystal influences the laser operation significantly, as the absorption and emission cross sections from the crystal are fairly different in accordance with the orientation on the crystal.
The thermal conductivity of popular double tungstates is in the buy to three–4 W/(K m) �?which is not terrible compared with other laser crystals (Despite the fact that several occasions below for YAG), and quite significant when compared Using the thermal conductivity of typical Eyeglasses.
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Talk to RP Photonics for just about any guidance about tungstate lasers, including femtosecond lasers and substantial-power lasers.